:root {
    --primary: #4f46e5;
    --primary-dark: #3730a3;
    --primary-light: #818cf8;
    --secondary: #06b6d4;
    --accent: #f59e0b;
    --bg: #f8fafc;
    --bg-dark: #0f172a;
    --text: #1e293b;
    --text-light: #64748b;
    --text-white: #f1f5f9;
    --border: #e2e8f0;
    --success: #10b981;
    --radius: 12px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
}

/* Navigation */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    transition: box-shadow 0.3s;
}

.site-header.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,0.08); }

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    font-weight: 800;
    font-size: 1.35rem;
    color: var(--primary);
}

.nav-logo svg { width: 32px; height: 32px; }

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover { color: var(--primary); }

.nav-cta {
    padding: 10px 24px;
    background: var(--primary);
    color: #fff !important;
    border-radius: 8px;
    font-weight: 600;
    transition: background 0.2s, transform 0.2s;
}

.nav-cta:hover { background: var(--primary-dark); transform: translateY(-1px); }

.nav-login {
    padding: 10px 20px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-weight: 600;
    transition: border-color 0.2s, color 0.2s;
}

.nav-login:hover { border-color: var(--primary); color: var(--primary); }

/* Mobile menu */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    margin: 5px 0;
    border-radius: 2px;
    transition: 0.3s;
}

/* Hero */
.hero {
    padding: 140px 24px 80px;
    text-align: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.06) 0%, transparent 60%);
    animation: heroGlow 20s ease-in-out infinite;
}

@keyframes heroGlow {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-10%, -10%); }
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 24px;
    letter-spacing: 0.5px;
}

.hero h1 {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

.hero p {
    font-size: 1.15rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto 32px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: #fff;
    color: var(--primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.4);
}

.btn-outline:hover {
    border-color: #fff;
    background: rgba(255,255,255,0.1);
    transform: translateY(-2px);
}

.btn-dark {
    background: var(--bg-dark);
    color: #fff;
}

.btn-dark:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(0,0,0,0.2); }

/* Hero stats */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 50px;
    padding-top: 40px;
    border-top: 1px solid rgba(255,255,255,0.15);
}

.stat-item { text-align: center; }

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    display: block;
}

.stat-label {
    font-size: 0.85rem;
    opacity: 0.75;
}

/* Sections */
.section {
    padding: 100px 24px;
}

.section-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 550px;
    margin: 0 auto;
}

/* Features grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.feature-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px 28px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.06);
}

.feature-icon {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: #fff;
}

.feature-icon svg { width: 26px; height: 26px; }

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 0.92rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* How it works */
.how-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    counter-reset: step;
}

.how-step {
    text-align: center;
    counter-increment: step;
}

.how-step::before {
    content: counter(step);
    display: block;
    width: 56px;
    height: 56px;
    line-height: 56px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #fff;
    font-size: 1.4rem;
    font-weight: 800;
    border-radius: 50%;
}

.how-step h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.how-step p {
    font-size: 0.92rem;
    color: var(--text-light);
    max-width: 300px;
    margin: 0 auto;
}

/* Plans/Pricing */
.plans-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    align-items: start;
}

.plan-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px 24px;
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
}

.plan-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,0,0,0.06); }

.plan-card.recommended {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary), 0 8px 30px rgba(79,70,229,0.12);
    transform: scale(1.03);
}

.plan-card.recommended:hover { transform: scale(1.03) translateY(-4px); }

.plan-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: #fff;
    padding: 4px 16px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}

.plan-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.plan-price {
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 4px;
}

.plan-price span {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-light);
}

.plan-desc {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 24px;
    min-height: 40px;
}

.plan-features {
    list-style: none;
    text-align: left;
    margin-bottom: 28px;
}

.plan-features li {
    padding: 8px 0;
    font-size: 0.9rem;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 10px;
}

.plan-features li::before {
    content: '✓';
    color: var(--success);
    font-weight: 700;
    font-size: 1rem;
}

.plan-features li.missing { opacity: 0.4; }
.plan-features li.missing::before { content: '✕'; color: #ef4444; }

.plan-cta {
    display: block;
    padding: 12px;
    border-radius: 10px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    background: var(--bg);
    color: var(--text);
}

.plan-cta:hover { background: var(--primary); color: #fff; }

.plan-card.recommended .plan-cta {
    background: var(--primary);
    color: #fff;
}

.plan-card.recommended .plan-cta:hover { background: var(--primary-dark); }

/* Testimonials */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.testimonial-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
}

.testimonial-rating {
    color: var(--accent);
    font-size: 1.1rem;
    margin-bottom: 12px;
}

.testimonial-text {
    font-size: 0.95rem;
    color: var(--text);
    line-height: 1.7;
    margin-bottom: 20px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.testimonial-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: 1.1rem;
}

.testimonial-name {
    font-weight: 600;
    font-size: 0.9rem;
}

.testimonial-role {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    text-align: center;
    padding: 80px 24px;
}

.cta-section h2 {
    font-size: 2.4rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.cta-section p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 32px;
}

/* Footer */
.site-footer {
    background: var(--bg-dark);
    color: var(--text-white);
    padding: 60px 24px 30px;
}

.footer-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.footer-brand p {
    font-size: 0.88rem;
    opacity: 0.7;
    line-height: 1.6;
    max-width: 300px;
}

.footer-col h4 {
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
    opacity: 0.6;
}

.footer-col a {
    display: block;
    color: var(--text-white);
    text-decoration: none;
    font-size: 0.9rem;
    opacity: 0.7;
    padding: 4px 0;
    transition: opacity 0.2s;
}

.footer-col a:hover { opacity: 1; }

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    opacity: 0.5;
}

/* Form pages (register, login, contact) */
.form-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 100px 24px 60px;
}

.form-card {
    background: #fff;
    border-radius: 16px;
    padding: 48px 40px;
    max-width: 480px;
    width: 100%;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}

.form-card h1 {
    font-size: 1.6rem;
    font-weight: 800;
    margin-bottom: 6px;
    text-align: center;
}

.form-card .form-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 0.92rem;
    margin-bottom: 28px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: 10px;
    font-size: 0.95rem;
    transition: border-color 0.2s;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.form-card .btn-primary {
    width: 100%;
    justify-content: center;
    background: var(--primary);
    color: #fff;
    padding: 14px;
    margin-top: 8px;
}

.form-card .btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: 0 6px 20px rgba(79,70,229,0.3);
}

.form-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 0.9rem;
    color: var(--text-light);
}

.form-footer a {
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
}

.form-footer a:hover { text-decoration: underline; }

.form-alert {
    padding: 12px 16px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-size: 0.9rem;
}

.form-alert.error {
    background: #fef2f2;
    color: #dc2626;
    border: 1px solid #fecaca;
}

.form-alert.success {
    background: #f0fdf4;
    color: #16a34a;
    border: 1px solid #bbf7d0;
}

/* Plans page specific */
.plans-page {
    padding-top: 120px;
}

/* Features detailed page */
.features-detailed .feature-row {
    display: flex;
    align-items: center;
    gap: 60px;
    margin-bottom: 80px;
}

.features-detailed .feature-row:nth-child(even) {
    flex-direction: row-reverse;
}

.feature-row-content { flex: 1; }

.feature-row-content h2 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.feature-row-content p {
    font-size: 1rem;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 16px;
}

.feature-row-content ul {
    list-style: none;
}

.feature-row-content ul li {
    padding: 6px 0;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.92rem;
}

.feature-row-content ul li::before {
    content: '✓';
    color: var(--success);
    font-weight: 700;
}

.feature-row-visual {
    flex: 1;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: var(--radius);
    padding: 60px;
    color: #fff;
    text-align: center;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-row-visual svg { width: 80px; height: 80px; opacity: 0.6; }

/* Contact page */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-info h2 {
    font-size: 1.6rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.contact-info p {
    color: var(--text-light);
    margin-bottom: 32px;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.contact-method-icon {
    width: 48px;
    height: 48px;
    background: var(--bg);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    flex-shrink: 0;
}

.contact-method h4 {
    font-size: 0.95rem;
    font-weight: 600;
}

.contact-method p {
    font-size: 0.85rem;
    color: var(--text-light);
    margin: 0;
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 1024px) {
    .plans-grid { grid-template-columns: repeat(2, 1fr); }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .hero h1 { font-size: 2rem; }
    .hero p { font-size: 1rem; }
    .hero-stats { gap: 30px; flex-wrap: wrap; }

    .nav-links {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    }

    .nav-links.open { display: flex; }
    .mobile-toggle { display: block; }

    .features-grid { grid-template-columns: 1fr; }
    .how-grid { grid-template-columns: 1fr; }
    .testimonials-grid { grid-template-columns: 1fr; }
    .plans-grid { grid-template-columns: 1fr; }
    .plan-card.recommended { transform: none; }
    .plan-card.recommended:hover { transform: translateY(-4px); }

    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }

    .features-detailed .feature-row,
    .features-detailed .feature-row:nth-child(even) {
        flex-direction: column;
        gap: 30px;
    }

    .contact-grid { grid-template-columns: 1fr; }

    .form-card { padding: 32px 24px; }

    .section-header h2 { font-size: 1.8rem; }
}